What is the metacarpophalangeal joint?

Metacarpophalangeal joint, or MCP joint, is one of the five joints in each hand that connects the metacarpal bones in the palm to the phalanxal bones in five fingers. These joints are large joints visible when the hand is clenched with a fist. With the exception of the MCP joint for the thumb, the joint is considered to be a condyloid joint on each finger. The condyloid is a synovial or movable joint characterized by its oval joint cavity and movements that allow: flexion, extension, adction, kidnapping and perimeter.

In the hand, the condyloid metacarpophalangal joint is formed by a convex surface on the metacarpal bones that puts into the concave surface on the phalanxal bone. Specifically, the oval head of the metacarpal is overcast by the elliptical cavity to the proximal or close end of the first Phalange in the finger. The shape of these joints allows movement in two planes: sagittal or front together and front or side. Flexion and extensin of the joint or bending of the fingers forward and backward occurs in the sagittal plane while in the front plane run outFor the adction and kidnapping of the joint or wags the fingers medially and laterally. Crossing or circling of the fingers occurs in both planes.

Metacarpophalangeal joint, which is an exception, is an exception of the thumb. With its movement limited mainly to bending and extension, the joint of the MCP thumb is largely considered to be Gontymoid or Hinge, joint. While the thumb can actually be cast from side to side and circle as they can fingers, it is a carpometakarpal joint that is located a few centimeters under MCP thumb, which is responsible for this movement.

Injuries that may occur in the metacarpophlangal joint include ligament injuries such as trunks or tears and fingers dislocation from the joint. Most of these injuries are Uncommon because MCP joints are less vulnerable to injury than interphalangal joints in the fingers due to their more protected position on the hand. Strans and tears generally result from acute hand injuries asis hyperextension of collateral bonds passing through the joint. This is the most common on the MCP thumb joint that has a smaller range of movement, and therefore suffers more easily, like stuck thumb and trying to catch football. Dislocations that are rare at all include the bones of the finger separated from the neighboring metacarpal, as the head of the metacarpal separates from the Phalange cavity.